| 常压非平衡等离子体条件下CO2的转化 |
| 摘要点击 1642 全文点击 2409 投稿时间：1997-07-14 |
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| 中文关键词 CO2转化 非平衡等离子体 脉冲电晕放电 常压 |
| 英文关键词 CO2 conversion non-equilibrium plasma pulse corona discharge atmospheric pressure |
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| 中文摘要 |
| 研究常温常压下,脉冲电晕等离子体对温室气体CO2的活化与转化。分别考察了纯CO2气体、CO2-H2、CO2-CH4体系中CO2的转化。纯CO2气体放电,CO2主要分解为CO和O2,CO的选择性在70%以上,随着脉冲电压峰值的增加,CO2转化率、CO产率有所提高。CO2-H2体系中,CO2转化率、CO产率明显高于单纯CO2体系,且随着H2/CO2摩尔比值的增大而升高。CO2-CH4体系中,CO2+CH4→2CO+2H2反应与CH4→1/2C2、C反应(CH4脱氢偶联与析炭反应)并存。适宜的CH4/CO2摩尔比值(1.0-1.7)可以促进CO2+CH4→2CO+2H2反应,抑制CH4→1/2C2、C反应. |
| 英文摘要 |
| At atmospheric pressure and ambient temperature,conversion of CO2 by using pulse corona plasma has been studied.The conversion of CO2 to CO in a pure CO2,CO2-H2 or CO2 CH4 gas was investigated,respectively.In a pure CO2 gas,it was found that the CO2 gas mainly transferred to CO and O2.The selectivity of CO is over 70%.CO2 conversion and CO yield are promoted with increasing peak value of pulse voltage.In a CO2-H2 gas,CO2 conversion and CO yield are much higher than those in a pure CO2 gas.Moreover,they increase with incressing the molar ratio of H2 to CO2.In a CO2-CH4 gas,it was revealed that the two reactions are in parallel:CO2+CH4→2CO+2H2 and CH4→1/2C2,C.The molar ratio of CH4 to CO2 being from 1.0 to 1.7,the former is enhanced and the latter is restrained. |
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